Time-frequency synchronous method for receiving data in short distance radio network

A short-range wireless, data-receiving technology, used in synchronization devices, synchronization/start-stop systems, digital transmission systems, etc., and can solve problems such as large amounts of computation
CN1822576AInactive Publication Date: 2006-08-23BEIJING TRANSPACIFIC IP TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING TRANSPACIFIC IP TECH DEV
Publication Date
2006-08-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

Present invention relates to a time frequently synchronizing method for receiving data short distance wireless networks, belonging to wireless communication technology field. It contains receiving RF transmitted signal, frequency conversion and sampling to become baseband receiving signal, utilizing training sequence periodicity to estimate code element cycle reciprocal decimals times frequency offset, according to real system frequency deviation region to determine the value taking possibility for code element cycle reciprocal integral multiple frequency offset, according to each hypotheses possible frequency offset to proceed frequency offset compensation to receiving signal, then to proceed sliding correlation with local sequence, according to correlative maximum value to determine frequency offset estimated value and time synchronizing position, thereby realizing time frequently combined synchronizing position. Said method reduces calculated amount in time and frequency synchronism, to make receiver having more low power consumption.
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Description

Technical field

[0001] The invention relates to a time-frequency synchronization method for receiving data in a short-range wireless network, in particular to a time synchronization and frequency synchronization method in a short-range wireless network, and belongs to the technical field of wireless communication. Background technique

[0002] Modern wireless network communication is mostly packet transmission, that is, only one data packet is transmitted between the transceivers at a time, and the time and frequency must be synchronized between the transceivers before each data transmission starts. In a spread-spectrum-based system, time synchronization should find the boundary of the spread-spectrum sequence and the optimal sampling time of each element in the sequence corresponding to the pulse. The frequency synchronization is to keep the carrier frequency of the receiving end and transmitting end consistent to eliminate the influence of frequency offset on data demodulation....

Claims

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